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  • Question
  • Who has discovered an Earth-sized planet, HD 21749b using Transiting Exoplanet Survey Satellite?


  • Options
  • A. ISRO
  • B. NASA
  • C. SpaceX
  • D. JAXA

  • Correct Answer
  • NASA 

    Explanation
    NASA's the Transiting Exoplanet Survey Satellite (TESS) has discovered an Earth-sized planet, HD 21749b and a "sub-Neptune" world, revolving around the star, HD 21749. The star lies 53 light-years from Earth. The research study has been published on 15th April, 2019 in 'The Astrophysical Journal Letters'. TESS was launched to Earth orbit in April 2018 on a SpaceX Falcon 9 rocket. One tool termed as 'Planet Finder Spectrograph' (PFS) on the 'Magellan II telescope' in Chile helped to confirm the planetary nature of the TESS signal and measure the mass of HD 21749b. HD 21749b is about 23 times heavier and 2.7 times wider than Earth. It is gaseous, has a substantial atmosphere but not as puffy as Uranus and Neptune. HD 21749b has an orbital period of 36 Earth days.

  • More questions

    • 1. The Scientist from this Institute have developed world's Thinnest Material by making usage of Magnesium Diboride.

    • Options
    • A. IIT Indore
    • B. IIT-Guwahati
    • C. IIT Gandhinagar
    • D. IIT Bhubaneswar
    • Discuss
    • 2. This country becomes World's 2nd biggest stock market.

    • Options
    • A. US
    • B. China
    • C. Japan
    • D. Germany
    • Discuss
    • 3. World Poetry Day observed on __________.

    • Options
    • A. 22nd March
    • B. 21st March
    • C. 23rd March
    • D. 24th March
    • Discuss
    • 4. Which state government has recently approved 27% quota for OBCs?

    • Options
    • A. Haryana
    • B. Madhya Pradesh
    • C. Odisha
    • D. West Bengal
    • Discuss
    • 5. How many Technology Mission Centre was launched by the Union Minister Harsh Vardhan?

    • Options
    • A. 6
    • B. 4
    • C. 3
    • D. 5
    • Discuss
    • 6. Who is planning to send a probe to study the sun early next year?

    • Options
    • A. JAXA
    • B. NASA
    • C. ISRO
    • D. BARC
    • Discuss
    • 7. The Union Cabinet approved introduction of the Indian Institutes of Information Technology Public Private Partnership (IIIT PPP) Bill, 2017. The bill grants statutory status to how many IIITs in Public Private Partnership and declares them as Institutions of National Importance?

    • Options
    • A. Fifteen
    • B. Sixteen
    • C. Twenty
    • D. Ten
    • Discuss
    • 8. Which country has celebrated the historic Mujibnagar day recently?

    • Options
    • A. Myanmar
    • B. Nepal
    • C. Sri Lanka
    • D. Bangladesh
    • Discuss
    • 9. Which team won the 2018 Club World Cup and record fourth in total?

    • Options
    • A. Real Madrid
    • B. Team Wellington
    • C. Guadalajara
    • D. Kashima Antlers
    • Discuss
    • 10. Indian Coast Guard offshore patrol vessel ____ commissioned by General Bipin Rawat

    • Options
    • A. Veera
    • B. ICGS Vijaya
    • C. ICGS Samrat
    • D. INS Vikrant
    • Discuss


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